The GAMOT group is developing two instruments that will economically map
temperatures in the global oceans at a resolution suitable for understanding
natural variability in climate and separating that from a global warming trend.
The status of these instruments, a surface suspended acoustic receiver and an
autonomous source mooring, will be presented. According to state-of-the-art
models of the ocean. changes in climate can be easily detected with acoustic
thermometers. These types of models represent climatic variability quite well
since they replicate variations in climate measured from satellite altimeters
and infrared sensors. The fastest way to detect global warming is to subtract
off natural variability and examine the residual for trends. [Work supported by
the Advanced Research Projects Agency.]